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3396c782 | 1 | /* drivers/net/ethernet/micrel/ks8851.c |
3ba81f3e BD |
2 | * |
3 | * Copyright 2009 Simtec Electronics | |
4 | * http://www.simtec.co.uk/ | |
5 | * Ben Dooks <ben@simtec.co.uk> | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | ||
0dc7d2b3 JP |
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
13 | ||
3ba81f3e BD |
14 | #define DEBUG |
15 | ||
a6b7a407 | 16 | #include <linux/interrupt.h> |
3ba81f3e BD |
17 | #include <linux/module.h> |
18 | #include <linux/kernel.h> | |
19 | #include <linux/netdevice.h> | |
20 | #include <linux/etherdevice.h> | |
21 | #include <linux/ethtool.h> | |
22 | #include <linux/cache.h> | |
23 | #include <linux/crc32.h> | |
24 | #include <linux/mii.h> | |
51b7b1c3 | 25 | #include <linux/eeprom_93cx6.h> |
ebf4ad95 | 26 | #include <linux/regulator/consumer.h> |
3ba81f3e BD |
27 | |
28 | #include <linux/spi/spi.h> | |
73fdeb82 SB |
29 | #include <linux/gpio.h> |
30 | #include <linux/of_gpio.h> | |
3ba81f3e BD |
31 | |
32 | #include "ks8851.h" | |
33 | ||
34 | /** | |
35 | * struct ks8851_rxctrl - KS8851 driver rx control | |
36 | * @mchash: Multicast hash-table data. | |
37 | * @rxcr1: KS_RXCR1 register setting | |
38 | * @rxcr2: KS_RXCR2 register setting | |
39 | * | |
40 | * Representation of the settings needs to control the receive filtering | |
41 | * such as the multicast hash-filter and the receive register settings. This | |
42 | * is used to make the job of working out if the receive settings change and | |
43 | * then issuing the new settings to the worker that will send the necessary | |
44 | * commands. | |
45 | */ | |
46 | struct ks8851_rxctrl { | |
47 | u16 mchash[4]; | |
48 | u16 rxcr1; | |
49 | u16 rxcr2; | |
50 | }; | |
51 | ||
52 | /** | |
53 | * union ks8851_tx_hdr - tx header data | |
54 | * @txb: The header as bytes | |
55 | * @txw: The header as 16bit, little-endian words | |
56 | * | |
57 | * A dual representation of the tx header data to allow | |
58 | * access to individual bytes, and to allow 16bit accesses | |
59 | * with 16bit alignment. | |
60 | */ | |
61 | union ks8851_tx_hdr { | |
62 | u8 txb[6]; | |
63 | __le16 txw[3]; | |
64 | }; | |
65 | ||
66 | /** | |
67 | * struct ks8851_net - KS8851 driver private data | |
68 | * @netdev: The network device we're bound to | |
69 | * @spidev: The spi device we're bound to. | |
70 | * @lock: Lock to ensure that the device is not accessed when busy. | |
71 | * @statelock: Lock on this structure for tx list. | |
72 | * @mii: The MII state information for the mii calls. | |
73 | * @rxctrl: RX settings for @rxctrl_work. | |
74 | * @tx_work: Work queue for tx packets | |
3ba81f3e BD |
75 | * @rxctrl_work: Work queue for updating RX mode and multicast lists |
76 | * @txq: Queue of packets for transmission. | |
77 | * @spi_msg1: pre-setup SPI transfer with one message, @spi_xfer1. | |
78 | * @spi_msg2: pre-setup SPI transfer with two messages, @spi_xfer2. | |
79 | * @txh: Space for generating packet TX header in DMA-able data | |
80 | * @rxd: Space for receiving SPI data, in DMA-able space. | |
81 | * @txd: Space for transmitting SPI data, in DMA-able space. | |
82 | * @msg_enable: The message flags controlling driver output (see ethtool). | |
83 | * @fid: Incrementing frame id tag. | |
84 | * @rc_ier: Cached copy of KS_IER. | |
7d997466 | 85 | * @rc_ccr: Cached copy of KS_CCR. |
3ba81f3e | 86 | * @rc_rxqcr: Cached copy of KS_RXQCR. |
51b7b1c3 | 87 | * @eeprom: 93CX6 EEPROM state for accessing on-board EEPROM. |
ebf4ad95 | 88 | * @vdd_reg: Optional regulator supplying the chip |
73fdeb82 SB |
89 | * @vdd_io: Optional digital power supply for IO |
90 | * @gpio: Optional reset_n gpio | |
3ba81f3e BD |
91 | * |
92 | * The @lock ensures that the chip is protected when certain operations are | |
93 | * in progress. When the read or write packet transfer is in progress, most | |
94 | * of the chip registers are not ccessible until the transfer is finished and | |
95 | * the DMA has been de-asserted. | |
96 | * | |
97 | * The @statelock is used to protect information in the structure which may | |
98 | * need to be accessed via several sources, such as the network driver layer | |
99 | * or one of the work queues. | |
100 | * | |
101 | * We align the buffers we may use for rx/tx to ensure that if the SPI driver | |
102 | * wants to DMA map them, it will not have any problems with data the driver | |
103 | * modifies. | |
104 | */ | |
105 | struct ks8851_net { | |
106 | struct net_device *netdev; | |
107 | struct spi_device *spidev; | |
108 | struct mutex lock; | |
109 | spinlock_t statelock; | |
110 | ||
111 | union ks8851_tx_hdr txh ____cacheline_aligned; | |
112 | u8 rxd[8]; | |
113 | u8 txd[8]; | |
114 | ||
115 | u32 msg_enable ____cacheline_aligned; | |
116 | u16 tx_space; | |
117 | u8 fid; | |
118 | ||
119 | u16 rc_ier; | |
120 | u16 rc_rxqcr; | |
7d997466 | 121 | u16 rc_ccr; |
3ba81f3e BD |
122 | |
123 | struct mii_if_info mii; | |
124 | struct ks8851_rxctrl rxctrl; | |
125 | ||
126 | struct work_struct tx_work; | |
3ba81f3e BD |
127 | struct work_struct rxctrl_work; |
128 | ||
129 | struct sk_buff_head txq; | |
130 | ||
131 | struct spi_message spi_msg1; | |
132 | struct spi_message spi_msg2; | |
133 | struct spi_transfer spi_xfer1; | |
134 | struct spi_transfer spi_xfer2[2]; | |
51b7b1c3 BD |
135 | |
136 | struct eeprom_93cx6 eeprom; | |
ebf4ad95 | 137 | struct regulator *vdd_reg; |
73fdeb82 SB |
138 | struct regulator *vdd_io; |
139 | int gpio; | |
3ba81f3e BD |
140 | }; |
141 | ||
142 | static int msg_enable; | |
143 | ||
3ba81f3e BD |
144 | /* shift for byte-enable data */ |
145 | #define BYTE_EN(_x) ((_x) << 2) | |
146 | ||
147 | /* turn register number and byte-enable mask into data for start of packet */ | |
148 | #define MK_OP(_byteen, _reg) (BYTE_EN(_byteen) | (_reg) << (8+2) | (_reg) >> 6) | |
149 | ||
150 | /* SPI register read/write calls. | |
151 | * | |
152 | * All these calls issue SPI transactions to access the chip's registers. They | |
153 | * all require that the necessary lock is held to prevent accesses when the | |
25985edc | 154 | * chip is busy transferring packet data (RX/TX FIFO accesses). |
3ba81f3e BD |
155 | */ |
156 | ||
157 | /** | |
158 | * ks8851_wrreg16 - write 16bit register value to chip | |
159 | * @ks: The chip state | |
160 | * @reg: The register address | |
161 | * @val: The value to write | |
162 | * | |
163 | * Issue a write to put the value @val into the register specified in @reg. | |
164 | */ | |
165 | static void ks8851_wrreg16(struct ks8851_net *ks, unsigned reg, unsigned val) | |
166 | { | |
167 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
168 | struct spi_message *msg = &ks->spi_msg1; | |
169 | __le16 txb[2]; | |
170 | int ret; | |
171 | ||
172 | txb[0] = cpu_to_le16(MK_OP(reg & 2 ? 0xC : 0x03, reg) | KS_SPIOP_WR); | |
173 | txb[1] = cpu_to_le16(val); | |
174 | ||
175 | xfer->tx_buf = txb; | |
176 | xfer->rx_buf = NULL; | |
177 | xfer->len = 4; | |
178 | ||
179 | ret = spi_sync(ks->spidev, msg); | |
180 | if (ret < 0) | |
0dc7d2b3 | 181 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
3ba81f3e BD |
182 | } |
183 | ||
160d0fad BD |
184 | /** |
185 | * ks8851_wrreg8 - write 8bit register value to chip | |
186 | * @ks: The chip state | |
187 | * @reg: The register address | |
188 | * @val: The value to write | |
189 | * | |
190 | * Issue a write to put the value @val into the register specified in @reg. | |
191 | */ | |
192 | static void ks8851_wrreg8(struct ks8851_net *ks, unsigned reg, unsigned val) | |
193 | { | |
194 | struct spi_transfer *xfer = &ks->spi_xfer1; | |
195 | struct spi_message *msg = &ks->spi_msg1; | |
196 | __le16 txb[2]; | |
197 | int ret; | |
198 | int bit; | |
199 | ||
200 | bit = 1 << (reg & 3); | |
201 | ||
202 | txb[0] = cpu_to_le16(MK_OP(bit, reg) | KS_SPIOP_WR); | |
203 | txb[1] = val; | |
204 | ||
205 | xfer->tx_buf = txb; | |
206 | xfer->rx_buf = NULL; | |
207 | xfer->len = 3; | |
208 | ||
209 | ret = spi_sync(ks->spidev, msg); | |
210 | if (ret < 0) | |
0dc7d2b3 | 211 | netdev_err(ks->netdev, "spi_sync() failed\n"); |
160d0fad BD |
212 | } |
213 | ||
3ba81f3e BD |
214 | /** |
215 | * ks8851_rdreg - issue read register command and return the data | |
216 | * @ks: The device state | |
217 | * @op: The register address and byte enables in message format. | |
218 | * @rxb: The RX buffer to return the result into | |
219 | * @rxl: The length of data expected. | |
220 | * | |
221 | * This is the low level read call that issues the necessary spi message(s) | |
222 | * to read data from the register specified in @op. | |
223 | */ | |
224 | static void ks8851_rdreg(struct ks8851_net *ks, unsigned op, | |
225 | u8 *rxb, unsigned rxl) | |
226 | { | |
227 | struct spi_transfer *xfer; | |
228 | struct spi_message *msg; | |
229 | __le16 *txb = (__le16 *)ks->txd; | |
230 | u8 *trx = ks->rxd; | |
231 | int ret; | |
232 | ||
233 | txb[0] = cpu_to_le16(op | KS_SPIOP_RD); | |
234 | ||
9efd3831 | 235 | if (ks->spidev->master->flags & SPI_MASTER_HALF_DUPLEX) { |
3ba81f3e BD |
236 | msg = &ks->spi_msg2; |
237 | xfer = ks->spi_xfer2; | |
238 | ||
239 | xfer->tx_buf = txb; | |
240 | xfer->rx_buf = NULL; | |
241 | xfer->len = 2; | |
242 | ||
243 | xfer++; | |
244 | xfer->tx_buf = NULL; | |
245 | xfer->rx_buf = trx; | |
246 | xfer->len = rxl; | |
9efd3831 SS |
247 | } else { |
248 | msg = &ks->spi_msg1; | |
249 | xfer = &ks->spi_xfer1; | |
250 | ||
251 | xfer->tx_buf = txb; | |
252 | xfer->rx_buf = trx; | |
253 | xfer->len = rxl + 2; | |
3ba81f3e BD |
254 | } |
255 | ||
256 | ret = spi_sync(ks->spidev, msg); | |
257 | if (ret < 0) | |
0dc7d2b3 | 258 | netdev_err(ks->netdev, "read: spi_sync() failed\n"); |
9efd3831 | 259 | else if (ks->spidev->master->flags & SPI_MASTER_HALF_DUPLEX) |
3ba81f3e | 260 | memcpy(rxb, trx, rxl); |
9efd3831 SS |
261 | else |
262 | memcpy(rxb, trx + 2, rxl); | |
3ba81f3e BD |
263 | } |
264 | ||
265 | /** | |
266 | * ks8851_rdreg8 - read 8 bit register from device | |
267 | * @ks: The chip information | |
268 | * @reg: The register address | |
269 | * | |
270 | * Read a 8bit register from the chip, returning the result | |
271 | */ | |
272 | static unsigned ks8851_rdreg8(struct ks8851_net *ks, unsigned reg) | |
273 | { | |
274 | u8 rxb[1]; | |
275 | ||
276 | ks8851_rdreg(ks, MK_OP(1 << (reg & 3), reg), rxb, 1); | |
277 | return rxb[0]; | |
278 | } | |
279 | ||
280 | /** | |
281 | * ks8851_rdreg16 - read 16 bit register from device | |
282 | * @ks: The chip information | |
283 | * @reg: The register address | |
284 | * | |
285 | * Read a 16bit register from the chip, returning the result | |
286 | */ | |
287 | static unsigned ks8851_rdreg16(struct ks8851_net *ks, unsigned reg) | |
288 | { | |
289 | __le16 rx = 0; | |
290 | ||
291 | ks8851_rdreg(ks, MK_OP(reg & 2 ? 0xC : 0x3, reg), (u8 *)&rx, 2); | |
292 | return le16_to_cpu(rx); | |
293 | } | |
294 | ||
295 | /** | |
296 | * ks8851_rdreg32 - read 32 bit register from device | |
297 | * @ks: The chip information | |
298 | * @reg: The register address | |
299 | * | |
300 | * Read a 32bit register from the chip. | |
301 | * | |
302 | * Note, this read requires the address be aligned to 4 bytes. | |
303 | */ | |
304 | static unsigned ks8851_rdreg32(struct ks8851_net *ks, unsigned reg) | |
305 | { | |
306 | __le32 rx = 0; | |
307 | ||
308 | WARN_ON(reg & 3); | |
309 | ||
310 | ks8851_rdreg(ks, MK_OP(0xf, reg), (u8 *)&rx, 4); | |
311 | return le32_to_cpu(rx); | |
312 | } | |
313 | ||
314 | /** | |
315 | * ks8851_soft_reset - issue one of the soft reset to the device | |
316 | * @ks: The device state. | |
317 | * @op: The bit(s) to set in the GRR | |
318 | * | |
319 | * Issue the relevant soft-reset command to the device's GRR register | |
320 | * specified by @op. | |
321 | * | |
322 | * Note, the delays are in there as a caution to ensure that the reset | |
323 | * has time to take effect and then complete. Since the datasheet does | |
324 | * not currently specify the exact sequence, we have chosen something | |
325 | * that seems to work with our device. | |
326 | */ | |
327 | static void ks8851_soft_reset(struct ks8851_net *ks, unsigned op) | |
328 | { | |
329 | ks8851_wrreg16(ks, KS_GRR, op); | |
330 | mdelay(1); /* wait a short time to effect reset */ | |
331 | ks8851_wrreg16(ks, KS_GRR, 0); | |
332 | mdelay(1); /* wait for condition to clear */ | |
333 | } | |
334 | ||
32f160d9 TH |
335 | /** |
336 | * ks8851_set_powermode - set power mode of the device | |
337 | * @ks: The device state | |
338 | * @pwrmode: The power mode value to write to KS_PMECR. | |
339 | * | |
340 | * Change the power mode of the chip. | |
341 | */ | |
342 | static void ks8851_set_powermode(struct ks8851_net *ks, unsigned pwrmode) | |
343 | { | |
344 | unsigned pmecr; | |
345 | ||
346 | netif_dbg(ks, hw, ks->netdev, "setting power mode %d\n", pwrmode); | |
347 | ||
348 | pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
349 | pmecr &= ~PMECR_PM_MASK; | |
350 | pmecr |= pwrmode; | |
351 | ||
352 | ks8851_wrreg16(ks, KS_PMECR, pmecr); | |
353 | } | |
354 | ||
3ba81f3e BD |
355 | /** |
356 | * ks8851_write_mac_addr - write mac address to device registers | |
357 | * @dev: The network device | |
358 | * | |
359 | * Update the KS8851 MAC address registers from the address in @dev. | |
360 | * | |
361 | * This call assumes that the chip is not running, so there is no need to | |
362 | * shutdown the RXQ process whilst setting this. | |
363 | */ | |
364 | static int ks8851_write_mac_addr(struct net_device *dev) | |
365 | { | |
366 | struct ks8851_net *ks = netdev_priv(dev); | |
160d0fad | 367 | int i; |
3ba81f3e BD |
368 | |
369 | mutex_lock(&ks->lock); | |
370 | ||
32f160d9 TH |
371 | /* |
372 | * Wake up chip in case it was powered off when stopped; otherwise, | |
373 | * the first write to the MAC address does not take effect. | |
374 | */ | |
375 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
160d0fad BD |
376 | for (i = 0; i < ETH_ALEN; i++) |
377 | ks8851_wrreg8(ks, KS_MAR(i), dev->dev_addr[i]); | |
32f160d9 TH |
378 | if (!netif_running(dev)) |
379 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
3ba81f3e BD |
380 | |
381 | mutex_unlock(&ks->lock); | |
382 | ||
383 | return 0; | |
384 | } | |
385 | ||
a9a8de21 BD |
386 | /** |
387 | * ks8851_read_mac_addr - read mac address from device registers | |
388 | * @dev: The network device | |
389 | * | |
390 | * Update our copy of the KS8851 MAC address from the registers of @dev. | |
391 | */ | |
392 | static void ks8851_read_mac_addr(struct net_device *dev) | |
393 | { | |
394 | struct ks8851_net *ks = netdev_priv(dev); | |
395 | int i; | |
396 | ||
397 | mutex_lock(&ks->lock); | |
398 | ||
399 | for (i = 0; i < ETH_ALEN; i++) | |
400 | dev->dev_addr[i] = ks8851_rdreg8(ks, KS_MAR(i)); | |
401 | ||
402 | mutex_unlock(&ks->lock); | |
403 | } | |
404 | ||
3ba81f3e BD |
405 | /** |
406 | * ks8851_init_mac - initialise the mac address | |
407 | * @ks: The device structure | |
408 | * | |
409 | * Get or create the initial mac address for the device and then set that | |
a9a8de21 | 410 | * into the station address register. If there is an EEPROM present, then |
7efd26d0 | 411 | * we try that. If no valid mac address is found we use eth_random_addr() |
3ba81f3e | 412 | * to create a new one. |
3ba81f3e BD |
413 | */ |
414 | static void ks8851_init_mac(struct ks8851_net *ks) | |
415 | { | |
416 | struct net_device *dev = ks->netdev; | |
417 | ||
a9a8de21 BD |
418 | /* first, try reading what we've got already */ |
419 | if (ks->rc_ccr & CCR_EEPROM) { | |
420 | ks8851_read_mac_addr(dev); | |
421 | if (is_valid_ether_addr(dev->dev_addr)) | |
422 | return; | |
423 | ||
424 | netdev_err(ks->netdev, "invalid mac address read %pM\n", | |
425 | dev->dev_addr); | |
426 | } | |
427 | ||
7ce5d222 | 428 | eth_hw_addr_random(dev); |
3ba81f3e BD |
429 | ks8851_write_mac_addr(dev); |
430 | } | |
431 | ||
3ba81f3e BD |
432 | /** |
433 | * ks8851_rdfifo - read data from the receive fifo | |
434 | * @ks: The device state. | |
435 | * @buff: The buffer address | |
436 | * @len: The length of the data to read | |
437 | * | |
9ddc5b6f | 438 | * Issue an RXQ FIFO read command and read the @len amount of data from |
3ba81f3e BD |
439 | * the FIFO into the buffer specified by @buff. |
440 | */ | |
441 | static void ks8851_rdfifo(struct ks8851_net *ks, u8 *buff, unsigned len) | |
442 | { | |
443 | struct spi_transfer *xfer = ks->spi_xfer2; | |
444 | struct spi_message *msg = &ks->spi_msg2; | |
445 | u8 txb[1]; | |
446 | int ret; | |
447 | ||
0dc7d2b3 JP |
448 | netif_dbg(ks, rx_status, ks->netdev, |
449 | "%s: %d@%p\n", __func__, len, buff); | |
3ba81f3e BD |
450 | |
451 | /* set the operation we're issuing */ | |
452 | txb[0] = KS_SPIOP_RXFIFO; | |
453 | ||
454 | xfer->tx_buf = txb; | |
455 | xfer->rx_buf = NULL; | |
456 | xfer->len = 1; | |
457 | ||
458 | xfer++; | |
459 | xfer->rx_buf = buff; | |
460 | xfer->tx_buf = NULL; | |
461 | xfer->len = len; | |
462 | ||
463 | ret = spi_sync(ks->spidev, msg); | |
464 | if (ret < 0) | |
0dc7d2b3 | 465 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
466 | } |
467 | ||
468 | /** | |
469 | * ks8851_dbg_dumpkkt - dump initial packet contents to debug | |
470 | * @ks: The device state | |
471 | * @rxpkt: The data for the received packet | |
472 | * | |
473 | * Dump the initial data from the packet to dev_dbg(). | |
474 | */ | |
475 | static void ks8851_dbg_dumpkkt(struct ks8851_net *ks, u8 *rxpkt) | |
476 | { | |
0dc7d2b3 JP |
477 | netdev_dbg(ks->netdev, |
478 | "pkt %02x%02x%02x%02x %02x%02x%02x%02x %02x%02x%02x%02x\n", | |
479 | rxpkt[4], rxpkt[5], rxpkt[6], rxpkt[7], | |
480 | rxpkt[8], rxpkt[9], rxpkt[10], rxpkt[11], | |
481 | rxpkt[12], rxpkt[13], rxpkt[14], rxpkt[15]); | |
3ba81f3e BD |
482 | } |
483 | ||
484 | /** | |
485 | * ks8851_rx_pkts - receive packets from the host | |
486 | * @ks: The device information. | |
487 | * | |
488 | * This is called from the IRQ work queue when the system detects that there | |
489 | * are packets in the receive queue. Find out how many packets there are and | |
490 | * read them from the FIFO. | |
491 | */ | |
492 | static void ks8851_rx_pkts(struct ks8851_net *ks) | |
493 | { | |
494 | struct sk_buff *skb; | |
495 | unsigned rxfc; | |
496 | unsigned rxlen; | |
497 | unsigned rxstat; | |
498 | u32 rxh; | |
499 | u8 *rxpkt; | |
500 | ||
501 | rxfc = ks8851_rdreg8(ks, KS_RXFC); | |
502 | ||
0dc7d2b3 JP |
503 | netif_dbg(ks, rx_status, ks->netdev, |
504 | "%s: %d packets\n", __func__, rxfc); | |
3ba81f3e BD |
505 | |
506 | /* Currently we're issuing a read per packet, but we could possibly | |
507 | * improve the code by issuing a single read, getting the receive | |
508 | * header, allocating the packet and then reading the packet data | |
509 | * out in one go. | |
510 | * | |
511 | * This form of operation would require us to hold the SPI bus' | |
512 | * chipselect low during the entie transaction to avoid any | |
25985edc | 513 | * reset to the data stream coming from the chip. |
3ba81f3e BD |
514 | */ |
515 | ||
516 | for (; rxfc != 0; rxfc--) { | |
517 | rxh = ks8851_rdreg32(ks, KS_RXFHSR); | |
518 | rxstat = rxh & 0xffff; | |
14bc435e | 519 | rxlen = (rxh >> 16) & 0xfff; |
3ba81f3e | 520 | |
0dc7d2b3 JP |
521 | netif_dbg(ks, rx_status, ks->netdev, |
522 | "rx: stat 0x%04x, len 0x%04x\n", rxstat, rxlen); | |
3ba81f3e BD |
523 | |
524 | /* the length of the packet includes the 32bit CRC */ | |
525 | ||
526 | /* set dma read address */ | |
527 | ks8851_wrreg16(ks, KS_RXFDPR, RXFDPR_RXFPAI | 0x00); | |
528 | ||
529 | /* start the packet dma process, and set auto-dequeue rx */ | |
530 | ks8851_wrreg16(ks, KS_RXQCR, | |
531 | ks->rc_rxqcr | RXQCR_SDA | RXQCR_ADRFE); | |
532 | ||
972c40b5 ED |
533 | if (rxlen > 4) { |
534 | unsigned int rxalign; | |
535 | ||
536 | rxlen -= 4; | |
537 | rxalign = ALIGN(rxlen, 4); | |
538 | skb = netdev_alloc_skb_ip_align(ks->netdev, rxalign); | |
539 | if (skb) { | |
3ba81f3e | 540 | |
972c40b5 ED |
541 | /* 4 bytes of status header + 4 bytes of |
542 | * garbage: we put them before ethernet | |
543 | * header, so that they are copied, | |
544 | * but ignored. | |
545 | */ | |
3ba81f3e | 546 | |
972c40b5 | 547 | rxpkt = skb_put(skb, rxlen) - 8; |
3ba81f3e | 548 | |
972c40b5 | 549 | ks8851_rdfifo(ks, rxpkt, rxalign + 8); |
3ba81f3e | 550 | |
972c40b5 ED |
551 | if (netif_msg_pktdata(ks)) |
552 | ks8851_dbg_dumpkkt(ks, rxpkt); | |
3ba81f3e | 553 | |
972c40b5 | 554 | skb->protocol = eth_type_trans(skb, ks->netdev); |
fbcf88b8 | 555 | netif_rx_ni(skb); |
3ba81f3e | 556 | |
972c40b5 ED |
557 | ks->netdev->stats.rx_packets++; |
558 | ks->netdev->stats.rx_bytes += rxlen; | |
559 | } | |
3ba81f3e BD |
560 | } |
561 | ||
562 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
563 | } | |
564 | } | |
565 | ||
566 | /** | |
656a05c8 FB |
567 | * ks8851_irq - IRQ handler for dealing with interrupt requests |
568 | * @irq: IRQ number | |
569 | * @_ks: cookie | |
3ba81f3e | 570 | * |
656a05c8 FB |
571 | * This handler is invoked when the IRQ line asserts to find out what happened. |
572 | * As we cannot allow ourselves to sleep in HARDIRQ context, this handler runs | |
573 | * in thread context. | |
3ba81f3e BD |
574 | * |
575 | * Read the interrupt status, work out what needs to be done and then clear | |
576 | * any of the interrupts that are not needed. | |
577 | */ | |
656a05c8 | 578 | static irqreturn_t ks8851_irq(int irq, void *_ks) |
3ba81f3e | 579 | { |
656a05c8 | 580 | struct ks8851_net *ks = _ks; |
3ba81f3e BD |
581 | unsigned status; |
582 | unsigned handled = 0; | |
583 | ||
584 | mutex_lock(&ks->lock); | |
585 | ||
586 | status = ks8851_rdreg16(ks, KS_ISR); | |
587 | ||
0dc7d2b3 JP |
588 | netif_dbg(ks, intr, ks->netdev, |
589 | "%s: status 0x%04x\n", __func__, status); | |
3ba81f3e | 590 | |
062e55e3 | 591 | if (status & IRQ_LCI) |
3ba81f3e | 592 | handled |= IRQ_LCI; |
3ba81f3e BD |
593 | |
594 | if (status & IRQ_LDI) { | |
595 | u16 pmecr = ks8851_rdreg16(ks, KS_PMECR); | |
596 | pmecr &= ~PMECR_WKEVT_MASK; | |
597 | ks8851_wrreg16(ks, KS_PMECR, pmecr | PMECR_WKEVT_LINK); | |
598 | ||
599 | handled |= IRQ_LDI; | |
600 | } | |
601 | ||
602 | if (status & IRQ_RXPSI) | |
603 | handled |= IRQ_RXPSI; | |
604 | ||
605 | if (status & IRQ_TXI) { | |
606 | handled |= IRQ_TXI; | |
607 | ||
608 | /* no lock here, tx queue should have been stopped */ | |
609 | ||
610 | /* update our idea of how much tx space is available to the | |
611 | * system */ | |
612 | ks->tx_space = ks8851_rdreg16(ks, KS_TXMIR); | |
613 | ||
0dc7d2b3 JP |
614 | netif_dbg(ks, intr, ks->netdev, |
615 | "%s: txspace %d\n", __func__, ks->tx_space); | |
3ba81f3e BD |
616 | } |
617 | ||
618 | if (status & IRQ_RXI) | |
619 | handled |= IRQ_RXI; | |
620 | ||
621 | if (status & IRQ_SPIBEI) { | |
622 | dev_err(&ks->spidev->dev, "%s: spi bus error\n", __func__); | |
623 | handled |= IRQ_SPIBEI; | |
624 | } | |
625 | ||
626 | ks8851_wrreg16(ks, KS_ISR, handled); | |
627 | ||
628 | if (status & IRQ_RXI) { | |
629 | /* the datasheet says to disable the rx interrupt during | |
630 | * packet read-out, however we're masking the interrupt | |
631 | * from the device so do not bother masking just the RX | |
632 | * from the device. */ | |
633 | ||
634 | ks8851_rx_pkts(ks); | |
635 | } | |
636 | ||
637 | /* if something stopped the rx process, probably due to wanting | |
638 | * to change the rx settings, then do something about restarting | |
639 | * it. */ | |
640 | if (status & IRQ_RXPSI) { | |
641 | struct ks8851_rxctrl *rxc = &ks->rxctrl; | |
642 | ||
643 | /* update the multicast hash table */ | |
644 | ks8851_wrreg16(ks, KS_MAHTR0, rxc->mchash[0]); | |
645 | ks8851_wrreg16(ks, KS_MAHTR1, rxc->mchash[1]); | |
646 | ks8851_wrreg16(ks, KS_MAHTR2, rxc->mchash[2]); | |
647 | ks8851_wrreg16(ks, KS_MAHTR3, rxc->mchash[3]); | |
648 | ||
649 | ks8851_wrreg16(ks, KS_RXCR2, rxc->rxcr2); | |
650 | ks8851_wrreg16(ks, KS_RXCR1, rxc->rxcr1); | |
651 | } | |
652 | ||
653 | mutex_unlock(&ks->lock); | |
654 | ||
062e55e3 SB |
655 | if (status & IRQ_LCI) |
656 | mii_check_link(&ks->mii); | |
657 | ||
3ba81f3e BD |
658 | if (status & IRQ_TXI) |
659 | netif_wake_queue(ks->netdev); | |
660 | ||
656a05c8 | 661 | return IRQ_HANDLED; |
3ba81f3e BD |
662 | } |
663 | ||
664 | /** | |
665 | * calc_txlen - calculate size of message to send packet | |
25985edc | 666 | * @len: Length of data |
3ba81f3e BD |
667 | * |
668 | * Returns the size of the TXFIFO message needed to send | |
669 | * this packet. | |
670 | */ | |
671 | static inline unsigned calc_txlen(unsigned len) | |
672 | { | |
673 | return ALIGN(len + 4, 4); | |
674 | } | |
675 | ||
676 | /** | |
677 | * ks8851_wrpkt - write packet to TX FIFO | |
678 | * @ks: The device state. | |
679 | * @txp: The sk_buff to transmit. | |
680 | * @irq: IRQ on completion of the packet. | |
681 | * | |
682 | * Send the @txp to the chip. This means creating the relevant packet header | |
683 | * specifying the length of the packet and the other information the chip | |
684 | * needs, such as IRQ on completion. Send the header and the packet data to | |
685 | * the device. | |
686 | */ | |
687 | static void ks8851_wrpkt(struct ks8851_net *ks, struct sk_buff *txp, bool irq) | |
688 | { | |
689 | struct spi_transfer *xfer = ks->spi_xfer2; | |
690 | struct spi_message *msg = &ks->spi_msg2; | |
691 | unsigned fid = 0; | |
692 | int ret; | |
693 | ||
0dc7d2b3 JP |
694 | netif_dbg(ks, tx_queued, ks->netdev, "%s: skb %p, %d@%p, irq %d\n", |
695 | __func__, txp, txp->len, txp->data, irq); | |
3ba81f3e BD |
696 | |
697 | fid = ks->fid++; | |
698 | fid &= TXFR_TXFID_MASK; | |
699 | ||
700 | if (irq) | |
701 | fid |= TXFR_TXIC; /* irq on completion */ | |
702 | ||
703 | /* start header at txb[1] to align txw entries */ | |
704 | ks->txh.txb[1] = KS_SPIOP_TXFIFO; | |
705 | ks->txh.txw[1] = cpu_to_le16(fid); | |
706 | ks->txh.txw[2] = cpu_to_le16(txp->len); | |
707 | ||
708 | xfer->tx_buf = &ks->txh.txb[1]; | |
709 | xfer->rx_buf = NULL; | |
710 | xfer->len = 5; | |
711 | ||
712 | xfer++; | |
713 | xfer->tx_buf = txp->data; | |
714 | xfer->rx_buf = NULL; | |
715 | xfer->len = ALIGN(txp->len, 4); | |
716 | ||
717 | ret = spi_sync(ks->spidev, msg); | |
718 | if (ret < 0) | |
0dc7d2b3 | 719 | netdev_err(ks->netdev, "%s: spi_sync() failed\n", __func__); |
3ba81f3e BD |
720 | } |
721 | ||
722 | /** | |
723 | * ks8851_done_tx - update and then free skbuff after transmitting | |
724 | * @ks: The device state | |
725 | * @txb: The buffer transmitted | |
726 | */ | |
727 | static void ks8851_done_tx(struct ks8851_net *ks, struct sk_buff *txb) | |
728 | { | |
729 | struct net_device *dev = ks->netdev; | |
730 | ||
731 | dev->stats.tx_bytes += txb->len; | |
732 | dev->stats.tx_packets++; | |
733 | ||
734 | dev_kfree_skb(txb); | |
735 | } | |
736 | ||
737 | /** | |
738 | * ks8851_tx_work - process tx packet(s) | |
739 | * @work: The work strucutre what was scheduled. | |
740 | * | |
741 | * This is called when a number of packets have been scheduled for | |
742 | * transmission and need to be sent to the device. | |
743 | */ | |
744 | static void ks8851_tx_work(struct work_struct *work) | |
745 | { | |
746 | struct ks8851_net *ks = container_of(work, struct ks8851_net, tx_work); | |
747 | struct sk_buff *txb; | |
3320eae5 | 748 | bool last = skb_queue_empty(&ks->txq); |
3ba81f3e BD |
749 | |
750 | mutex_lock(&ks->lock); | |
751 | ||
752 | while (!last) { | |
753 | txb = skb_dequeue(&ks->txq); | |
754 | last = skb_queue_empty(&ks->txq); | |
755 | ||
761172fb AA |
756 | if (txb != NULL) { |
757 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr | RXQCR_SDA); | |
758 | ks8851_wrpkt(ks, txb, last); | |
759 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
760 | ks8851_wrreg16(ks, KS_TXQCR, TXQCR_METFE); | |
3ba81f3e | 761 | |
761172fb AA |
762 | ks8851_done_tx(ks, txb); |
763 | } | |
3ba81f3e BD |
764 | } |
765 | ||
766 | mutex_unlock(&ks->lock); | |
3ba81f3e BD |
767 | } |
768 | ||
769 | /** | |
770 | * ks8851_net_open - open network device | |
771 | * @dev: The network device being opened. | |
772 | * | |
773 | * Called when the network device is marked active, such as a user executing | |
774 | * 'ifconfig up' on the device. | |
775 | */ | |
776 | static int ks8851_net_open(struct net_device *dev) | |
777 | { | |
778 | struct ks8851_net *ks = netdev_priv(dev); | |
779 | ||
780 | /* lock the card, even if we may not actually be doing anything | |
781 | * else at the moment */ | |
782 | mutex_lock(&ks->lock); | |
783 | ||
0dc7d2b3 | 784 | netif_dbg(ks, ifup, ks->netdev, "opening\n"); |
3ba81f3e BD |
785 | |
786 | /* bring chip out of any power saving mode it was in */ | |
787 | ks8851_set_powermode(ks, PMECR_PM_NORMAL); | |
788 | ||
789 | /* issue a soft reset to the RX/TX QMU to put it into a known | |
790 | * state. */ | |
791 | ks8851_soft_reset(ks, GRR_QMU); | |
792 | ||
793 | /* setup transmission parameters */ | |
794 | ||
795 | ks8851_wrreg16(ks, KS_TXCR, (TXCR_TXE | /* enable transmit process */ | |
796 | TXCR_TXPE | /* pad to min length */ | |
797 | TXCR_TXCRC | /* add CRC */ | |
798 | TXCR_TXFCE)); /* enable flow control */ | |
799 | ||
800 | /* auto-increment tx data, reset tx pointer */ | |
801 | ks8851_wrreg16(ks, KS_TXFDPR, TXFDPR_TXFPAI); | |
802 | ||
803 | /* setup receiver control */ | |
804 | ||
805 | ks8851_wrreg16(ks, KS_RXCR1, (RXCR1_RXPAFMA | /* from mac filter */ | |
806 | RXCR1_RXFCE | /* enable flow control */ | |
807 | RXCR1_RXBE | /* broadcast enable */ | |
808 | RXCR1_RXUE | /* unicast enable */ | |
809 | RXCR1_RXE)); /* enable rx block */ | |
810 | ||
811 | /* transfer entire frames out in one go */ | |
812 | ks8851_wrreg16(ks, KS_RXCR2, RXCR2_SRDBL_FRAME); | |
813 | ||
814 | /* set receive counter timeouts */ | |
815 | ks8851_wrreg16(ks, KS_RXDTTR, 1000); /* 1ms after first frame to IRQ */ | |
816 | ks8851_wrreg16(ks, KS_RXDBCTR, 4096); /* >4Kbytes in buffer to IRQ */ | |
817 | ks8851_wrreg16(ks, KS_RXFCTR, 10); /* 10 frames to IRQ */ | |
818 | ||
819 | ks->rc_rxqcr = (RXQCR_RXFCTE | /* IRQ on frame count exceeded */ | |
820 | RXQCR_RXDBCTE | /* IRQ on byte count exceeded */ | |
821 | RXQCR_RXDTTE); /* IRQ on time exceeded */ | |
822 | ||
823 | ks8851_wrreg16(ks, KS_RXQCR, ks->rc_rxqcr); | |
824 | ||
825 | /* clear then enable interrupts */ | |
826 | ||
827 | #define STD_IRQ (IRQ_LCI | /* Link Change */ \ | |
828 | IRQ_TXI | /* TX done */ \ | |
829 | IRQ_RXI | /* RX done */ \ | |
830 | IRQ_SPIBEI | /* SPI bus error */ \ | |
831 | IRQ_TXPSI | /* TX process stop */ \ | |
832 | IRQ_RXPSI) /* RX process stop */ | |
833 | ||
834 | ks->rc_ier = STD_IRQ; | |
835 | ks8851_wrreg16(ks, KS_ISR, STD_IRQ); | |
836 | ks8851_wrreg16(ks, KS_IER, STD_IRQ); | |
837 | ||
838 | netif_start_queue(ks->netdev); | |
839 | ||
0dc7d2b3 | 840 | netif_dbg(ks, ifup, ks->netdev, "network device up\n"); |
3ba81f3e BD |
841 | |
842 | mutex_unlock(&ks->lock); | |
843 | return 0; | |
844 | } | |
845 | ||
846 | /** | |
847 | * ks8851_net_stop - close network device | |
848 | * @dev: The device being closed. | |
849 | * | |
850 | * Called to close down a network device which has been active. Cancell any | |
851 | * work, shutdown the RX and TX process and then place the chip into a low | |
852 | * power state whilst it is not being used. | |
853 | */ | |
854 | static int ks8851_net_stop(struct net_device *dev) | |
855 | { | |
856 | struct ks8851_net *ks = netdev_priv(dev); | |
857 | ||
0dc7d2b3 | 858 | netif_info(ks, ifdown, dev, "shutting down\n"); |
3ba81f3e BD |
859 | |
860 | netif_stop_queue(dev); | |
861 | ||
862 | mutex_lock(&ks->lock); | |
c5a99937 SB |
863 | /* turn off the IRQs and ack any outstanding */ |
864 | ks8851_wrreg16(ks, KS_IER, 0x0000); | |
865 | ks8851_wrreg16(ks, KS_ISR, 0xffff); | |
866 | mutex_unlock(&ks->lock); | |
3ba81f3e BD |
867 | |
868 | /* stop any outstanding work */ | |
3ba81f3e BD |
869 | flush_work(&ks->tx_work); |
870 | flush_work(&ks->rxctrl_work); | |
871 | ||
c5a99937 | 872 | mutex_lock(&ks->lock); |
3ba81f3e BD |
873 | /* shutdown RX process */ |
874 | ks8851_wrreg16(ks, KS_RXCR1, 0x0000); | |
875 | ||
876 | /* shutdown TX process */ | |
877 | ks8851_wrreg16(ks, KS_TXCR, 0x0000); | |
878 | ||
879 | /* set powermode to soft power down to save power */ | |
880 | ks8851_set_powermode(ks, PMECR_PM_SOFTDOWN); | |
c5a99937 | 881 | mutex_unlock(&ks->lock); |
3ba81f3e BD |
882 | |
883 | /* ensure any queued tx buffers are dumped */ | |
884 | while (!skb_queue_empty(&ks->txq)) { | |
885 | struct sk_buff *txb = skb_dequeue(&ks->txq); | |
886 | ||
0dc7d2b3 JP |
887 | netif_dbg(ks, ifdown, ks->netdev, |
888 | "%s: freeing txb %p\n", __func__, txb); | |
3ba81f3e BD |
889 | |
890 | dev_kfree_skb(txb); | |
891 | } | |
892 | ||
3ba81f3e BD |
893 | return 0; |
894 | } | |
895 | ||
896 | /** | |
897 | * ks8851_start_xmit - transmit packet | |
898 | * @skb: The buffer to transmit | |
899 | * @dev: The device used to transmit the packet. | |
900 | * | |
901 | * Called by the network layer to transmit the @skb. Queue the packet for | |
902 | * the device and schedule the necessary work to transmit the packet when | |
903 | * it is free. | |
904 | * | |
905 | * We do this to firstly avoid sleeping with the network device locked, | |
906 | * and secondly so we can round up more than one packet to transmit which | |
907 | * means we can try and avoid generating too many transmit done interrupts. | |
908 | */ | |
61357325 SH |
909 | static netdev_tx_t ks8851_start_xmit(struct sk_buff *skb, |
910 | struct net_device *dev) | |
3ba81f3e BD |
911 | { |
912 | struct ks8851_net *ks = netdev_priv(dev); | |
913 | unsigned needed = calc_txlen(skb->len); | |
61357325 | 914 | netdev_tx_t ret = NETDEV_TX_OK; |
3ba81f3e | 915 | |
0dc7d2b3 JP |
916 | netif_dbg(ks, tx_queued, ks->netdev, |
917 | "%s: skb %p, %d@%p\n", __func__, skb, skb->len, skb->data); | |
3ba81f3e BD |
918 | |
919 | spin_lock(&ks->statelock); | |
920 | ||
921 | if (needed > ks->tx_space) { | |
922 | netif_stop_queue(dev); | |
923 | ret = NETDEV_TX_BUSY; | |
924 | } else { | |
925 | ks->tx_space -= needed; | |
926 | skb_queue_tail(&ks->txq, skb); | |
927 | } | |
928 | ||
929 | spin_unlock(&ks->statelock); | |
930 | schedule_work(&ks->tx_work); | |
931 | ||
932 | return ret; | |
933 | } | |
934 | ||
935 | /** | |
936 | * ks8851_rxctrl_work - work handler to change rx mode | |
937 | * @work: The work structure this belongs to. | |
938 | * | |
939 | * Lock the device and issue the necessary changes to the receive mode from | |
940 | * the network device layer. This is done so that we can do this without | |
941 | * having to sleep whilst holding the network device lock. | |
942 | * | |
943 | * Since the recommendation from Micrel is that the RXQ is shutdown whilst the | |
944 | * receive parameters are programmed, we issue a write to disable the RXQ and | |
945 | * then wait for the interrupt handler to be triggered once the RXQ shutdown is | |
946 | * complete. The interrupt handler then writes the new values into the chip. | |
947 | */ | |
948 | static void ks8851_rxctrl_work(struct work_struct *work) | |
949 | { | |
950 | struct ks8851_net *ks = container_of(work, struct ks8851_net, rxctrl_work); | |
951 | ||
952 | mutex_lock(&ks->lock); | |
953 | ||
954 | /* need to shutdown RXQ before modifying filter parameters */ | |
955 | ks8851_wrreg16(ks, KS_RXCR1, 0x00); | |
956 | ||
957 | mutex_unlock(&ks->lock); | |
958 | } | |
959 | ||
960 | static void ks8851_set_rx_mode(struct net_device *dev) | |
961 | { | |
962 | struct ks8851_net *ks = netdev_priv(dev); | |
963 | struct ks8851_rxctrl rxctrl; | |
964 | ||
965 | memset(&rxctrl, 0, sizeof(rxctrl)); | |
966 | ||
967 | if (dev->flags & IFF_PROMISC) { | |
968 | /* interface to receive everything */ | |
969 | ||
970 | rxctrl.rxcr1 = RXCR1_RXAE | RXCR1_RXINVF; | |
971 | } else if (dev->flags & IFF_ALLMULTI) { | |
972 | /* accept all multicast packets */ | |
973 | ||
974 | rxctrl.rxcr1 = (RXCR1_RXME | RXCR1_RXAE | | |
975 | RXCR1_RXPAFMA | RXCR1_RXMAFMA); | |
4cd24eaf | 976 | } else if (dev->flags & IFF_MULTICAST && !netdev_mc_empty(dev)) { |
22bedad3 | 977 | struct netdev_hw_addr *ha; |
3ba81f3e | 978 | u32 crc; |
3ba81f3e BD |
979 | |
980 | /* accept some multicast */ | |
981 | ||
22bedad3 JP |
982 | netdev_for_each_mc_addr(ha, dev) { |
983 | crc = ether_crc(ETH_ALEN, ha->addr); | |
3ba81f3e BD |
984 | crc >>= (32 - 6); /* get top six bits */ |
985 | ||
986 | rxctrl.mchash[crc >> 4] |= (1 << (crc & 0xf)); | |
3ba81f3e BD |
987 | } |
988 | ||
b6a71bfa | 989 | rxctrl.rxcr1 = RXCR1_RXME | RXCR1_RXPAFMA; |
3ba81f3e BD |
990 | } else { |
991 | /* just accept broadcast / unicast */ | |
992 | rxctrl.rxcr1 = RXCR1_RXPAFMA; | |
993 | } | |
994 | ||
995 | rxctrl.rxcr1 |= (RXCR1_RXUE | /* unicast enable */ | |
996 | RXCR1_RXBE | /* broadcast enable */ | |
997 | RXCR1_RXE | /* RX process enable */ | |
998 | RXCR1_RXFCE); /* enable flow control */ | |
999 | ||
1000 | rxctrl.rxcr2 |= RXCR2_SRDBL_FRAME; | |
1001 | ||
1002 | /* schedule work to do the actual set of the data if needed */ | |
1003 | ||
1004 | spin_lock(&ks->statelock); | |
1005 | ||
1006 | if (memcmp(&rxctrl, &ks->rxctrl, sizeof(rxctrl)) != 0) { | |
1007 | memcpy(&ks->rxctrl, &rxctrl, sizeof(ks->rxctrl)); | |
1008 | schedule_work(&ks->rxctrl_work); | |
1009 | } | |
1010 | ||
1011 | spin_unlock(&ks->statelock); | |
1012 | } | |
1013 | ||
1014 | static int ks8851_set_mac_address(struct net_device *dev, void *addr) | |
1015 | { | |
1016 | struct sockaddr *sa = addr; | |
1017 | ||
1018 | if (netif_running(dev)) | |
1019 | return -EBUSY; | |
1020 | ||
1021 | if (!is_valid_ether_addr(sa->sa_data)) | |
1022 | return -EADDRNOTAVAIL; | |
1023 | ||
1024 | memcpy(dev->dev_addr, sa->sa_data, ETH_ALEN); | |
1025 | return ks8851_write_mac_addr(dev); | |
1026 | } | |
1027 | ||
1028 | static int ks8851_net_ioctl(struct net_device *dev, struct ifreq *req, int cmd) | |
1029 | { | |
1030 | struct ks8851_net *ks = netdev_priv(dev); | |
1031 | ||
1032 | if (!netif_running(dev)) | |
1033 | return -EINVAL; | |
1034 | ||
1035 | return generic_mii_ioctl(&ks->mii, if_mii(req), cmd, NULL); | |
1036 | } | |
1037 | ||
1038 | static const struct net_device_ops ks8851_netdev_ops = { | |
1039 | .ndo_open = ks8851_net_open, | |
1040 | .ndo_stop = ks8851_net_stop, | |
1041 | .ndo_do_ioctl = ks8851_net_ioctl, | |
1042 | .ndo_start_xmit = ks8851_start_xmit, | |
1043 | .ndo_set_mac_address = ks8851_set_mac_address, | |
1044 | .ndo_set_rx_mode = ks8851_set_rx_mode, | |
3ba81f3e BD |
1045 | .ndo_validate_addr = eth_validate_addr, |
1046 | }; | |
1047 | ||
1048 | /* ethtool support */ | |
1049 | ||
1050 | static void ks8851_get_drvinfo(struct net_device *dev, | |
1051 | struct ethtool_drvinfo *di) | |
1052 | { | |
1053 | strlcpy(di->driver, "KS8851", sizeof(di->driver)); | |
1054 | strlcpy(di->version, "1.00", sizeof(di->version)); | |
1055 | strlcpy(di->bus_info, dev_name(dev->dev.parent), sizeof(di->bus_info)); | |
1056 | } | |
1057 | ||
1058 | static u32 ks8851_get_msglevel(struct net_device *dev) | |
1059 | { | |
1060 | struct ks8851_net *ks = netdev_priv(dev); | |
1061 | return ks->msg_enable; | |
1062 | } | |
1063 | ||
1064 | static void ks8851_set_msglevel(struct net_device *dev, u32 to) | |
1065 | { | |
1066 | struct ks8851_net *ks = netdev_priv(dev); | |
1067 | ks->msg_enable = to; | |
1068 | } | |
1069 | ||
98f2b092 PR |
1070 | static int ks8851_get_link_ksettings(struct net_device *dev, |
1071 | struct ethtool_link_ksettings *cmd) | |
3ba81f3e BD |
1072 | { |
1073 | struct ks8851_net *ks = netdev_priv(dev); | |
82c01a84 | 1074 | |
1075 | mii_ethtool_get_link_ksettings(&ks->mii, cmd); | |
1076 | ||
1077 | return 0; | |
3ba81f3e BD |
1078 | } |
1079 | ||
98f2b092 PR |
1080 | static int ks8851_set_link_ksettings(struct net_device *dev, |
1081 | const struct ethtool_link_ksettings *cmd) | |
3ba81f3e BD |
1082 | { |
1083 | struct ks8851_net *ks = netdev_priv(dev); | |
98f2b092 | 1084 | return mii_ethtool_set_link_ksettings(&ks->mii, cmd); |
3ba81f3e BD |
1085 | } |
1086 | ||
1087 | static u32 ks8851_get_link(struct net_device *dev) | |
1088 | { | |
1089 | struct ks8851_net *ks = netdev_priv(dev); | |
1090 | return mii_link_ok(&ks->mii); | |
1091 | } | |
1092 | ||
1093 | static int ks8851_nway_reset(struct net_device *dev) | |
1094 | { | |
1095 | struct ks8851_net *ks = netdev_priv(dev); | |
1096 | return mii_nway_restart(&ks->mii); | |
1097 | } | |
1098 | ||
51b7b1c3 | 1099 | /* EEPROM support */ |
a84afa40 | 1100 | |
51b7b1c3 | 1101 | static void ks8851_eeprom_regread(struct eeprom_93cx6 *ee) |
a84afa40 | 1102 | { |
51b7b1c3 BD |
1103 | struct ks8851_net *ks = ee->data; |
1104 | unsigned val; | |
a84afa40 | 1105 | |
51b7b1c3 | 1106 | val = ks8851_rdreg16(ks, KS_EEPCR); |
a84afa40 | 1107 | |
51b7b1c3 BD |
1108 | ee->reg_data_out = (val & EEPCR_EESB) ? 1 : 0; |
1109 | ee->reg_data_clock = (val & EEPCR_EESCK) ? 1 : 0; | |
1110 | ee->reg_chip_select = (val & EEPCR_EECS) ? 1 : 0; | |
1111 | } | |
a84afa40 | 1112 | |
51b7b1c3 BD |
1113 | static void ks8851_eeprom_regwrite(struct eeprom_93cx6 *ee) |
1114 | { | |
1115 | struct ks8851_net *ks = ee->data; | |
1116 | unsigned val = EEPCR_EESA; /* default - eeprom access on */ | |
1117 | ||
1118 | if (ee->drive_data) | |
1119 | val |= EEPCR_EESRWA; | |
1120 | if (ee->reg_data_in) | |
1121 | val |= EEPCR_EEDO; | |
1122 | if (ee->reg_data_clock) | |
1123 | val |= EEPCR_EESCK; | |
1124 | if (ee->reg_chip_select) | |
1125 | val |= EEPCR_EECS; | |
1126 | ||
1127 | ks8851_wrreg16(ks, KS_EEPCR, val); | |
1128 | } | |
a84afa40 | 1129 | |
51b7b1c3 BD |
1130 | /** |
1131 | * ks8851_eeprom_claim - claim device EEPROM and activate the interface | |
1132 | * @ks: The network device state. | |
1133 | * | |
1134 | * Check for the presence of an EEPROM, and then activate software access | |
1135 | * to the device. | |
1136 | */ | |
1137 | static int ks8851_eeprom_claim(struct ks8851_net *ks) | |
1138 | { | |
1139 | if (!(ks->rc_ccr & CCR_EEPROM)) | |
1140 | return -ENOENT; | |
a84afa40 | 1141 | |
51b7b1c3 | 1142 | mutex_lock(&ks->lock); |
a84afa40 | 1143 | |
51b7b1c3 BD |
1144 | /* start with clock low, cs high */ |
1145 | ks8851_wrreg16(ks, KS_EEPCR, EEPCR_EESA | EEPCR_EECS); | |
1146 | return 0; | |
1147 | } | |
a84afa40 | 1148 | |
51b7b1c3 BD |
1149 | /** |
1150 | * ks8851_eeprom_release - release the EEPROM interface | |
1151 | * @ks: The device state | |
1152 | * | |
1153 | * Release the software access to the device EEPROM | |
1154 | */ | |
1155 | static void ks8851_eeprom_release(struct ks8851_net *ks) | |
1156 | { | |
1157 | unsigned val = ks8851_rdreg16(ks, KS_EEPCR); | |
a84afa40 | 1158 | |
51b7b1c3 BD |
1159 | ks8851_wrreg16(ks, KS_EEPCR, val & ~EEPCR_EESA); |
1160 | mutex_unlock(&ks->lock); | |
a84afa40 SJ |
1161 | } |
1162 | ||
51b7b1c3 BD |
1163 | #define KS_EEPROM_MAGIC (0x00008851) |
1164 | ||
a84afa40 | 1165 | static int ks8851_set_eeprom(struct net_device *dev, |
51b7b1c3 | 1166 | struct ethtool_eeprom *ee, u8 *data) |
a84afa40 SJ |
1167 | { |
1168 | struct ks8851_net *ks = netdev_priv(dev); | |
51b7b1c3 BD |
1169 | int offset = ee->offset; |
1170 | int len = ee->len; | |
1171 | u16 tmp; | |
1172 | ||
1173 | /* currently only support byte writing */ | |
1174 | if (len != 1) | |
a84afa40 SJ |
1175 | return -EINVAL; |
1176 | ||
51b7b1c3 BD |
1177 | if (ee->magic != KS_EEPROM_MAGIC) |
1178 | return -EINVAL; | |
a84afa40 | 1179 | |
51b7b1c3 BD |
1180 | if (ks8851_eeprom_claim(ks)) |
1181 | return -ENOENT; | |
1182 | ||
1183 | eeprom_93cx6_wren(&ks->eeprom, true); | |
1184 | ||
1185 | /* ethtool currently only supports writing bytes, which means | |
1186 | * we have to read/modify/write our 16bit EEPROMs */ | |
a84afa40 | 1187 | |
51b7b1c3 | 1188 | eeprom_93cx6_read(&ks->eeprom, offset/2, &tmp); |
a84afa40 | 1189 | |
51b7b1c3 BD |
1190 | if (offset & 1) { |
1191 | tmp &= 0xff; | |
1192 | tmp |= *data << 8; | |
1193 | } else { | |
1194 | tmp &= 0xff00; | |
1195 | tmp |= *data; | |
a84afa40 | 1196 | } |
a84afa40 | 1197 | |
51b7b1c3 BD |
1198 | eeprom_93cx6_write(&ks->eeprom, offset/2, tmp); |
1199 | eeprom_93cx6_wren(&ks->eeprom, false); | |
1200 | ||
1201 | ks8851_eeprom_release(ks); | |
1202 | ||
1203 | return 0; | |
1204 | } | |
a84afa40 | 1205 | |
51b7b1c3 BD |
1206 | static int ks8851_get_eeprom(struct net_device *dev, |
1207 | struct ethtool_eeprom *ee, u8 *data) | |
1208 | { | |
1209 | struct ks8851_net *ks = netdev_priv(dev); | |
1210 | int offset = ee->offset; | |
1211 | int len = ee->len; | |
a84afa40 | 1212 | |
51b7b1c3 BD |
1213 | /* must be 2 byte aligned */ |
1214 | if (len & 1 || offset & 1) | |
1215 | return -EINVAL; | |
a84afa40 | 1216 | |
51b7b1c3 BD |
1217 | if (ks8851_eeprom_claim(ks)) |
1218 | return -ENOENT; | |
a84afa40 | 1219 | |
51b7b1c3 | 1220 | ee->magic = KS_EEPROM_MAGIC; |
a84afa40 | 1221 | |
51b7b1c3 BD |
1222 | eeprom_93cx6_multiread(&ks->eeprom, offset/2, (__le16 *)data, len/2); |
1223 | ks8851_eeprom_release(ks); | |
a84afa40 | 1224 | |
51b7b1c3 BD |
1225 | return 0; |
1226 | } | |
a84afa40 | 1227 | |
51b7b1c3 BD |
1228 | static int ks8851_get_eeprom_len(struct net_device *dev) |
1229 | { | |
1230 | struct ks8851_net *ks = netdev_priv(dev); | |
1231 | ||
1232 | /* currently, we assume it is an 93C46 attached, so return 128 */ | |
1233 | return ks->rc_ccr & CCR_EEPROM ? 128 : 0; | |
a84afa40 SJ |
1234 | } |
1235 | ||
3ba81f3e BD |
1236 | static const struct ethtool_ops ks8851_ethtool_ops = { |
1237 | .get_drvinfo = ks8851_get_drvinfo, | |
1238 | .get_msglevel = ks8851_get_msglevel, | |
1239 | .set_msglevel = ks8851_set_msglevel, | |
3ba81f3e BD |
1240 | .get_link = ks8851_get_link, |
1241 | .nway_reset = ks8851_nway_reset, | |
a84afa40 SJ |
1242 | .get_eeprom_len = ks8851_get_eeprom_len, |
1243 | .get_eeprom = ks8851_get_eeprom, | |
1244 | .set_eeprom = ks8851_set_eeprom, | |
98f2b092 PR |
1245 | .get_link_ksettings = ks8851_get_link_ksettings, |
1246 | .set_link_ksettings = ks8851_set_link_ksettings, | |
3ba81f3e BD |
1247 | }; |
1248 | ||
1249 | /* MII interface controls */ | |
1250 | ||
1251 | /** | |
1252 | * ks8851_phy_reg - convert MII register into a KS8851 register | |
1253 | * @reg: MII register number. | |
1254 | * | |
1255 | * Return the KS8851 register number for the corresponding MII PHY register | |
1256 | * if possible. Return zero if the MII register has no direct mapping to the | |
1257 | * KS8851 register set. | |
1258 | */ | |
1259 | static int ks8851_phy_reg(int reg) | |
1260 | { | |
1261 | switch (reg) { | |
1262 | case MII_BMCR: | |
1263 | return KS_P1MBCR; | |
1264 | case MII_BMSR: | |
1265 | return KS_P1MBSR; | |
1266 | case MII_PHYSID1: | |
1267 | return KS_PHY1ILR; | |
1268 | case MII_PHYSID2: | |
1269 | return KS_PHY1IHR; | |
1270 | case MII_ADVERTISE: | |
1271 | return KS_P1ANAR; | |
1272 | case MII_LPA: | |
1273 | return KS_P1ANLPR; | |
1274 | } | |
1275 | ||
1276 | return 0x0; | |
1277 | } | |
1278 | ||
1279 | /** | |
1280 | * ks8851_phy_read - MII interface PHY register read. | |
1281 | * @dev: The network device the PHY is on. | |
1282 | * @phy_addr: Address of PHY (ignored as we only have one) | |
1283 | * @reg: The register to read. | |
1284 | * | |
1285 | * This call reads data from the PHY register specified in @reg. Since the | |
25985edc | 1286 | * device does not support all the MII registers, the non-existent values |
3ba81f3e BD |
1287 | * are always returned as zero. |
1288 | * | |
1289 | * We return zero for unsupported registers as the MII code does not check | |
1290 | * the value returned for any error status, and simply returns it to the | |
1291 | * caller. The mii-tool that the driver was tested with takes any -ve error | |
1292 | * as real PHY capabilities, thus displaying incorrect data to the user. | |
1293 | */ | |
1294 | static int ks8851_phy_read(struct net_device *dev, int phy_addr, int reg) | |
1295 | { | |
1296 | struct ks8851_net *ks = netdev_priv(dev); | |
1297 | int ksreg; | |
1298 | int result; | |
1299 | ||
1300 | ksreg = ks8851_phy_reg(reg); | |
1301 | if (!ksreg) | |
1302 | return 0x0; /* no error return allowed, so use zero */ | |
1303 | ||
1304 | mutex_lock(&ks->lock); | |
1305 | result = ks8851_rdreg16(ks, ksreg); | |
1306 | mutex_unlock(&ks->lock); | |
1307 | ||
1308 | return result; | |
1309 | } | |
1310 | ||
1311 | static void ks8851_phy_write(struct net_device *dev, | |
1312 | int phy, int reg, int value) | |
1313 | { | |
1314 | struct ks8851_net *ks = netdev_priv(dev); | |
1315 | int ksreg; | |
1316 | ||
1317 | ksreg = ks8851_phy_reg(reg); | |
1318 | if (ksreg) { | |
1319 | mutex_lock(&ks->lock); | |
1320 | ks8851_wrreg16(ks, ksreg, value); | |
1321 | mutex_unlock(&ks->lock); | |
1322 | } | |
1323 | } | |
1324 | ||
1325 | /** | |
1326 | * ks8851_read_selftest - read the selftest memory info. | |
1327 | * @ks: The device state | |
1328 | * | |
1329 | * Read and check the TX/RX memory selftest information. | |
1330 | */ | |
1331 | static int ks8851_read_selftest(struct ks8851_net *ks) | |
1332 | { | |
1333 | unsigned both_done = MBIR_TXMBF | MBIR_RXMBF; | |
1334 | int ret = 0; | |
1335 | unsigned rd; | |
1336 | ||
1337 | rd = ks8851_rdreg16(ks, KS_MBIR); | |
1338 | ||
1339 | if ((rd & both_done) != both_done) { | |
0dc7d2b3 | 1340 | netdev_warn(ks->netdev, "Memory selftest not finished\n"); |
3ba81f3e BD |
1341 | return 0; |
1342 | } | |
1343 | ||
1344 | if (rd & MBIR_TXMBFA) { | |
0dc7d2b3 | 1345 | netdev_err(ks->netdev, "TX memory selftest fail\n"); |
3ba81f3e BD |
1346 | ret |= 1; |
1347 | } | |
1348 | ||
1349 | if (rd & MBIR_RXMBFA) { | |
0dc7d2b3 | 1350 | netdev_err(ks->netdev, "RX memory selftest fail\n"); |
3ba81f3e BD |
1351 | ret |= 2; |
1352 | } | |
1353 | ||
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | /* driver bus management functions */ | |
1358 | ||
d5b40921 LPC |
1359 | #ifdef CONFIG_PM_SLEEP |
1360 | ||
1361 | static int ks8851_suspend(struct device *dev) | |
1d5439b9 | 1362 | { |
d5b40921 LPC |
1363 | struct ks8851_net *ks = dev_get_drvdata(dev); |
1364 | struct net_device *netdev = ks->netdev; | |
1d5439b9 | 1365 | |
d5b40921 LPC |
1366 | if (netif_running(netdev)) { |
1367 | netif_device_detach(netdev); | |
1368 | ks8851_net_stop(netdev); | |
1d5439b9 AA |
1369 | } |
1370 | ||
1371 | return 0; | |
1372 | } | |
1373 | ||
d5b40921 | 1374 | static int ks8851_resume(struct device *dev) |
1d5439b9 | 1375 | { |
d5b40921 LPC |
1376 | struct ks8851_net *ks = dev_get_drvdata(dev); |
1377 | struct net_device *netdev = ks->netdev; | |
1d5439b9 | 1378 | |
d5b40921 LPC |
1379 | if (netif_running(netdev)) { |
1380 | ks8851_net_open(netdev); | |
1381 | netif_device_attach(netdev); | |
1d5439b9 AA |
1382 | } |
1383 | ||
1384 | return 0; | |
1385 | } | |
8ac2b3c0 | 1386 | #endif |
d5b40921 LPC |
1387 | |
1388 | static SIMPLE_DEV_PM_OPS(ks8851_pm_ops, ks8851_suspend, ks8851_resume); | |
1d5439b9 | 1389 | |
654b8c5c | 1390 | static int ks8851_probe(struct spi_device *spi) |
3ba81f3e BD |
1391 | { |
1392 | struct net_device *ndev; | |
1393 | struct ks8851_net *ks; | |
1394 | int ret; | |
51c61a28 | 1395 | unsigned cider; |
73fdeb82 | 1396 | int gpio; |
3ba81f3e BD |
1397 | |
1398 | ndev = alloc_etherdev(sizeof(struct ks8851_net)); | |
41de8d4c | 1399 | if (!ndev) |
3ba81f3e | 1400 | return -ENOMEM; |
3ba81f3e BD |
1401 | |
1402 | spi->bits_per_word = 8; | |
1403 | ||
1404 | ks = netdev_priv(ndev); | |
1405 | ||
1406 | ks->netdev = ndev; | |
1407 | ks->spidev = spi; | |
1408 | ks->tx_space = 6144; | |
1409 | ||
73fdeb82 SB |
1410 | gpio = of_get_named_gpio_flags(spi->dev.of_node, "reset-gpios", |
1411 | 0, NULL); | |
1412 | if (gpio == -EPROBE_DEFER) { | |
1413 | ret = gpio; | |
1414 | goto err_gpio; | |
1415 | } | |
1416 | ||
1417 | ks->gpio = gpio; | |
1418 | if (gpio_is_valid(gpio)) { | |
1419 | ret = devm_gpio_request_one(&spi->dev, gpio, | |
1420 | GPIOF_OUT_INIT_LOW, "ks8851_rst_n"); | |
1421 | if (ret) { | |
1422 | dev_err(&spi->dev, "reset gpio request failed\n"); | |
1423 | goto err_gpio; | |
1424 | } | |
1425 | } | |
1426 | ||
d64eed1d | 1427 | ks->vdd_io = devm_regulator_get(&spi->dev, "vdd-io"); |
73fdeb82 SB |
1428 | if (IS_ERR(ks->vdd_io)) { |
1429 | ret = PTR_ERR(ks->vdd_io); | |
d64eed1d SB |
1430 | goto err_reg_io; |
1431 | } | |
1432 | ||
1433 | ret = regulator_enable(ks->vdd_io); | |
1434 | if (ret) { | |
1435 | dev_err(&spi->dev, "regulator vdd_io enable fail: %d\n", | |
1436 | ret); | |
1437 | goto err_reg_io; | |
73fdeb82 SB |
1438 | } |
1439 | ||
d64eed1d | 1440 | ks->vdd_reg = devm_regulator_get(&spi->dev, "vdd"); |
ebf4ad95 NM |
1441 | if (IS_ERR(ks->vdd_reg)) { |
1442 | ret = PTR_ERR(ks->vdd_reg); | |
d64eed1d SB |
1443 | goto err_reg; |
1444 | } | |
1445 | ||
1446 | ret = regulator_enable(ks->vdd_reg); | |
1447 | if (ret) { | |
1448 | dev_err(&spi->dev, "regulator vdd enable fail: %d\n", | |
1449 | ret); | |
1450 | goto err_reg; | |
ebf4ad95 NM |
1451 | } |
1452 | ||
73fdeb82 SB |
1453 | if (gpio_is_valid(gpio)) { |
1454 | usleep_range(10000, 11000); | |
1455 | gpio_set_value(gpio, 1); | |
1456 | } | |
ebf4ad95 | 1457 | |
3ba81f3e BD |
1458 | mutex_init(&ks->lock); |
1459 | spin_lock_init(&ks->statelock); | |
1460 | ||
1461 | INIT_WORK(&ks->tx_work, ks8851_tx_work); | |
3ba81f3e BD |
1462 | INIT_WORK(&ks->rxctrl_work, ks8851_rxctrl_work); |
1463 | ||
1464 | /* initialise pre-made spi transfer messages */ | |
1465 | ||
1466 | spi_message_init(&ks->spi_msg1); | |
1467 | spi_message_add_tail(&ks->spi_xfer1, &ks->spi_msg1); | |
1468 | ||
1469 | spi_message_init(&ks->spi_msg2); | |
1470 | spi_message_add_tail(&ks->spi_xfer2[0], &ks->spi_msg2); | |
1471 | spi_message_add_tail(&ks->spi_xfer2[1], &ks->spi_msg2); | |
1472 | ||
51b7b1c3 BD |
1473 | /* setup EEPROM state */ |
1474 | ||
1475 | ks->eeprom.data = ks; | |
1476 | ks->eeprom.width = PCI_EEPROM_WIDTH_93C46; | |
1477 | ks->eeprom.register_read = ks8851_eeprom_regread; | |
1478 | ks->eeprom.register_write = ks8851_eeprom_regwrite; | |
1479 | ||
3ba81f3e BD |
1480 | /* setup mii state */ |
1481 | ks->mii.dev = ndev; | |
1482 | ks->mii.phy_id = 1, | |
1483 | ks->mii.phy_id_mask = 1; | |
1484 | ks->mii.reg_num_mask = 0xf; | |
1485 | ks->mii.mdio_read = ks8851_phy_read; | |
1486 | ks->mii.mdio_write = ks8851_phy_write; | |
1487 | ||
1488 | dev_info(&spi->dev, "message enable is %d\n", msg_enable); | |
1489 | ||
1490 | /* set the default message enable */ | |
1491 | ks->msg_enable = netif_msg_init(msg_enable, (NETIF_MSG_DRV | | |
1492 | NETIF_MSG_PROBE | | |
1493 | NETIF_MSG_LINK)); | |
1494 | ||
1495 | skb_queue_head_init(&ks->txq); | |
1496 | ||
7ad24ea4 | 1497 | ndev->ethtool_ops = &ks8851_ethtool_ops; |
3ba81f3e BD |
1498 | SET_NETDEV_DEV(ndev, &spi->dev); |
1499 | ||
8f996607 | 1500 | spi_set_drvdata(spi, ks); |
3ba81f3e BD |
1501 | |
1502 | ndev->if_port = IF_PORT_100BASET; | |
1503 | ndev->netdev_ops = &ks8851_netdev_ops; | |
1504 | ndev->irq = spi->irq; | |
1505 | ||
57dada68 BD |
1506 | /* issue a global soft reset to reset the device. */ |
1507 | ks8851_soft_reset(ks, GRR_GSR); | |
1508 | ||
3ba81f3e | 1509 | /* simple check for a valid chip being connected to the bus */ |
51c61a28 MR |
1510 | cider = ks8851_rdreg16(ks, KS_CIDER); |
1511 | if ((cider & ~CIDER_REV_MASK) != CIDER_ID) { | |
3ba81f3e BD |
1512 | dev_err(&spi->dev, "failed to read device ID\n"); |
1513 | ret = -ENODEV; | |
1514 | goto err_id; | |
1515 | } | |
1516 | ||
7d997466 SJ |
1517 | /* cache the contents of the CCR register for EEPROM, etc. */ |
1518 | ks->rc_ccr = ks8851_rdreg16(ks, KS_CCR); | |
1519 | ||
3ba81f3e BD |
1520 | ks8851_read_selftest(ks); |
1521 | ks8851_init_mac(ks); | |
1522 | ||
656a05c8 FB |
1523 | ret = request_threaded_irq(spi->irq, NULL, ks8851_irq, |
1524 | IRQF_TRIGGER_LOW | IRQF_ONESHOT, | |
1525 | ndev->name, ks); | |
3ba81f3e BD |
1526 | if (ret < 0) { |
1527 | dev_err(&spi->dev, "failed to get irq\n"); | |
1528 | goto err_irq; | |
1529 | } | |
1530 | ||
1531 | ret = register_netdev(ndev); | |
1532 | if (ret) { | |
1533 | dev_err(&spi->dev, "failed to register network device\n"); | |
1534 | goto err_netdev; | |
1535 | } | |
1536 | ||
a9a8de21 | 1537 | netdev_info(ndev, "revision %d, MAC %pM, IRQ %d, %s EEPROM\n", |
51c61a28 | 1538 | CIDER_REV_GET(cider), ndev->dev_addr, ndev->irq, |
a9a8de21 | 1539 | ks->rc_ccr & CCR_EEPROM ? "has" : "no"); |
3ba81f3e BD |
1540 | |
1541 | return 0; | |
1542 | ||
1543 | ||
1544 | err_netdev: | |
e8195b24 | 1545 | free_irq(ndev->irq, ks); |
3ba81f3e | 1546 | |
3ba81f3e | 1547 | err_irq: |
73fdeb82 SB |
1548 | if (gpio_is_valid(gpio)) |
1549 | gpio_set_value(gpio, 0); | |
ebf4ad95 | 1550 | err_id: |
d64eed1d | 1551 | regulator_disable(ks->vdd_reg); |
ebf4ad95 | 1552 | err_reg: |
d64eed1d | 1553 | regulator_disable(ks->vdd_io); |
73fdeb82 SB |
1554 | err_reg_io: |
1555 | err_gpio: | |
3ba81f3e BD |
1556 | free_netdev(ndev); |
1557 | return ret; | |
1558 | } | |
1559 | ||
654b8c5c | 1560 | static int ks8851_remove(struct spi_device *spi) |
3ba81f3e | 1561 | { |
8f996607 | 1562 | struct ks8851_net *priv = spi_get_drvdata(spi); |
3ba81f3e BD |
1563 | |
1564 | if (netif_msg_drv(priv)) | |
0dc7d2b3 | 1565 | dev_info(&spi->dev, "remove\n"); |
3ba81f3e BD |
1566 | |
1567 | unregister_netdev(priv->netdev); | |
1568 | free_irq(spi->irq, priv); | |
73fdeb82 SB |
1569 | if (gpio_is_valid(priv->gpio)) |
1570 | gpio_set_value(priv->gpio, 0); | |
d64eed1d SB |
1571 | regulator_disable(priv->vdd_reg); |
1572 | regulator_disable(priv->vdd_io); | |
3ba81f3e BD |
1573 | free_netdev(priv->netdev); |
1574 | ||
1575 | return 0; | |
1576 | } | |
1577 | ||
f4c6e06d SB |
1578 | static const struct of_device_id ks8851_match_table[] = { |
1579 | { .compatible = "micrel,ks8851" }, | |
1580 | { } | |
1581 | }; | |
88c79664 | 1582 | MODULE_DEVICE_TABLE(of, ks8851_match_table); |
f4c6e06d | 1583 | |
3ba81f3e BD |
1584 | static struct spi_driver ks8851_driver = { |
1585 | .driver = { | |
1586 | .name = "ks8851", | |
f4c6e06d | 1587 | .of_match_table = ks8851_match_table, |
8ac2b3c0 | 1588 | .pm = &ks8851_pm_ops, |
3ba81f3e BD |
1589 | }, |
1590 | .probe = ks8851_probe, | |
654b8c5c | 1591 | .remove = ks8851_remove, |
3ba81f3e | 1592 | }; |
0582ce92 | 1593 | module_spi_driver(ks8851_driver); |
3ba81f3e BD |
1594 | |
1595 | MODULE_DESCRIPTION("KS8851 Network driver"); | |
1596 | MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>"); | |
1597 | MODULE_LICENSE("GPL"); | |
1598 | ||
1599 | module_param_named(message, msg_enable, int, 0); | |
1600 | MODULE_PARM_DESC(message, "Message verbosity level (0=none, 31=all)"); | |
e0626e38 | 1601 | MODULE_ALIAS("spi:ks8851"); |